MATTHEW MAYNARD is making a habit of scoring repeat centuries at grounds where Glamorgan rarely feature.

Last year, after a gap of 11 years he hammered two championship centuries against Gloucestershire at the Cheltenham College ground and yesterday he struck 115 to follow the unbeaten 151 he made at Darlington in 1991 to steer Glamorgan to an 86-run victory over the Durham County Board.

The success gives Glamor-gan a last-16 Cheltenham & Gloucester Trophy tie at home to Derbyshire on May 28 - and left coach John Derrick endorsing Maynard's England credentials, even though the middle-order batsman is now

37.

"He is at the very top of his form - turning in quality performances game after game," said Derrick, who claimed he had never seen Maynard play better.

"Now that he is wiser and older he has eliminated all his old faults.

"If England's one-day squad are looking for a brilliant fielder and a quality batsman, someone who can see games off, then Maynard is their man."

Maynard was in imperious form to strike his third hundred in all competitions, adding to

the championship centuries he made against Derbyshire and Hampshire last month.

His contribution, together with Ian Thomas' highest score in one-day cricket, enabled Glamorgan to reach 312 for nine in 50 overs - a score the hosts were never going to seriously challenge in their cup clash.

After being put into bat on a lively pitch, where the ball darted around in the early overs, Thomas and Robert Croft put on 56 in 12 overs before the captain and Michael Powell were dismissed in successive overs.

But Maynard and Thomas put on 135 in 19 overs for the third wicket to lay the foundation of Glamorgan's substantial score.

Thomas, striking the ball extremely hard on either side of the wicket, struck two enormous sixes and 10 fours - gathering his runs from only 103 balls before being dismissed seven short of his century.

The other Glamorgan batsmen sacrificed their wickets in a quest for quick runs, although Michael Kasprowicz brought up the 300 with a massive six which sailed out of the attractive, tree-lined ground.

The Durham Board soon made up for the loss of an early wicket as Alan Worthy and Phil Mustard attacked the Glamorgan bowling at every opportunity.

Mustard, a former England Under-19 player, struck sixes off Kasprowicz and Andrew Davies and, at one stage, the home side were rattling along at seven runs an over.

Mustard was eventually caught in Croft's second over, but Worthy went on to strike a fluent 50.

Although the other batsmen made useful contributions, the Durham part-timers were unable to maintain the required run rate against the first-class county as wickets fell at regular intervals.

Croft took 3-54, taking his tally to nine in three one-day games this season, while there were two apiece for Alex Wharf and Adrian Dale as the Welsh county eventually strolled to victory in this cup encounter.

The home innings was wrapped up with 14 balls to spare as the Durham Board were eventually dismissed for 226 in the 48th over.